There are
2,081 mi
from Janesville, WI to Manteca, CA
That's the driving distance. It would take 1 day 11 hours to go from Janesville, Wisconsin to Manteca, California.
The flight distance (direct flight from Janesville, WI to Manteca, CA) is 1,720.47 mi.
2,081 mi = 3,349.65 kms